Psilocybin is a naturally occurring psychedelic compound. There are more than 180 species of mushrooms that contain psilocybin, or its derivative psilocin. Psilocybin mushrooms have a long history of use in Mesoamerica in spiritual and religious rituals, and are currently one of the most popular recreational psychedelics in the United States and Europe.
Psilocybin mushrooms can be therapeutic for cluster headaches, obsessive-compulsive disorders, anxiety, depression, and addiction.
Magic mushrooms are illegal and categorized as a Schedule I controlled substance in the United States, but there are human studies allowed in special cases”